Shared-IP Non-Global Zones

The
shared-IP zone is the default type. The zone must have one or more dedicated
IP addresses. A shared-IP zone shares the IP layer configuration and state
with the global zone. The zone should use the shared-IP instance if both of
the following are true:

The zone is to be connected to the same data-link, that is,
be on the same IP subnet or subnets as the global zone

You do not want the other capabilities that the exclusive-IP
zone provides.

Shared-IP zones are assigned one or more IP addresses using the zonecfg command. The data-link names must also be configured in the global
zone.

In the zonecfgnet resource, the address and the physical properties must be set.
The defrouter property is optional.

These addresses are associated with logical network interfaces. The ifconfig command can be used from the global zone to add or remove
logical interfaces in a running zone. For more information, see Shared-IP Network Interfaces.